Search Results for author: João Magalhães

Found 12 papers, 2 papers with code

Polite Task-oriented Dialog Agents: To Generate or to Rewrite?

no code implementations WASSA (ACL) 2022 Diogo Silva, David Semedo, João Magalhães

In this paper, we conduct a novel assessment of politeness strategies for task-oriented dialog agents under a transfer learning scenario.

Transfer Learning

Dwell in the Beginning: How Language Models Embed Long Documents for Dense Retrieval

no code implementations5 Apr 2024 João Coelho, Bruno Martins, João Magalhães, Jamie Callan, Chenyan Xiong

This study investigates the existence of positional biases in Transformer-based models for text representation learning, particularly in the context of web document retrieval.

Decoder Language Modelling +2

Large Language Models for Captioning and Retrieving Remote Sensing Images

no code implementations9 Feb 2024 João Daniel Silva, João Magalhães, Devis Tuia, Bruno Martins

In this work, we propose RS-CapRet, a Vision and Language method for remote sensing tasks, in particular image captioning and text-image retrieval.

Cross-Modal Retrieval Decoder +6

Plan-Grounded Large Language Models for Dual Goal Conversational Settings

no code implementations1 Feb 2024 Diogo Glória-Silva, Rafael Ferreira, Diogo Tavares, David Semedo, João Magalhães

In this paper, we tackle a dual goal mixed-initiative conversational setting where the LLM not only grounds the conversation on an arbitrary plan but also seeks to satisfy both a procedural plan and user instructions.

TWIZ-v2: The Wizard of Multimodal Conversational-Stimulus

no code implementations3 Oct 2023 Rafael Ferreira, Diogo Tavares, Diogo Silva, Rodrigo Valério, João Bordalo, Inês Simões, Vasco Ramos, David Semedo, João Magalhães

In this report, we describe the vision, challenges, and scientific contributions of the Task Wizard team, TWIZ, in the Alexa Prize TaskBot Challenge 2022.

Language Modelling Large Language Model

Grounded Complex Task Segmentation for Conversational Assistants

1 code implementation20 Sep 2023 Rafael Ferreira, David Semedo, João Magalhães

Hence, when conversational assistants walk users through the steps of complex tasks, there is a need to structure the task into manageable pieces of information of the right length and complexity.

Rating Prediction in Conversational Task Assistants with Behavioral and Conversational-Flow Features

1 code implementation20 Sep 2023 Rafael Ferreira, David Semedo, João Magalhães

Predicting the success of Conversational Task Assistants (CTA) can be critical to understand user behavior and act accordingly.

The Wizard of Curiosities: Enriching Dialogues with Fun Facts

no code implementations20 Sep 2023 Frederico Vicente, Rafael Ferreira, David Semedo, João Magalhães

Introducing curiosities in a conversation is a way to teach something new to the person in a pleasant and enjoyable way.

Task Conditioned BERT for Joint Intent Detection and Slot-filling

no code implementations11 Aug 2023 Diogo Tavares, Pedro Azevedo, David Semedo, Ricardo Sousa, João Magalhães

Dialogue systems need to deal with the unpredictability of user intents to track dialogue state and the heterogeneity of slots to understand user preferences.

Intent Detection slot-filling +1

Knowledge-driven Answer Generation for Conversational Search

no code implementations14 Apr 2021 Mariana Leite, Rafael Ferreira, David Semedo, João Magalhães

In this work, we propose a knowledge-driven answer generation approach for open-domain conversational search, where a conversation-wide entities' knowledge graph is used to bias search-answer generation.

Answer Generation Conversational Search

Cross-Modal Subspace Learning with Scheduled Adaptive Margin Constraints

no code implementations30 Sep 2019 David Semedo, João Magalhães

Cross-modal embeddings, between textual and visual modalities, aim to organise multimodal instances by their semantic correlations.

Incremental Learning

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